systemd.snapshotsystemdDeveloperLennartPoetteringlennart@poettering.netsystemd.snapshot5systemd.snapshotSnapshot unit configurationsnapshot.snapshotDescriptionSnapshot units are not configured via unit
configuration files. Nonetheless they are named
similar to filenames. A unit whose name ends in
.snapshot refers to a dynamic
snapshot of the systemd runtime state.Snapshots are not configured on disk but created
dynamically via systemctl snapshot
(see
systemctl8
for details) or an equivalent command. When created,
they will automatically get dependencies on the
currently activated units. They act as saved
runtime state of the systemd manager. Later on, the
user may choose to return to the saved state via
systemctl isolate. They are
useful to roll back to a defined state after
temporarily starting/stopping services or
similar.See Alsosystemd1,
systemctl8,
systemd.unit5,
systemd.directives7